Patent GB-190902407-A (GB)
Title: Improvements in or relating to Sole Rounding, Sole Channelling or similar Machines.
Inventor: BOULT ALFRED JULIUS
IPC: A43D43/02
Filed: 1909-02-01
Granted: 1910-01-27
Abstract: 2407. Boult, A. J., [United Shoe Machinery Co.]. Feb. 1. Vertical-cutter type for cutting sheet material in direction of feed; traversing-cutter type for cutting designs channelling. -Relates to sole-rounding and to sole-rounding and channelling machines of the type having a knife - support to which is pivoted a knife - carrier, and having a pattern movable relatively to the knife-support about a centre to transfer the point of operation of the knife around the pattern. An actuating-member is pivoted to the knife-carrier and so moved as to maintain the point of connexion between the actuating-member and the knife-carrier continuously in approximate alinement with the edge of the pattern. This pivotal connexion is also held substantially stationary with relation to the pattern during the swinging movement of the knife-carrier around the end of the pattern. In the construction shown, the actuating - member swings about the centre of relative motion referred to above, and is also given a radial movement in relation thereto. The pattern is secured on a fixed support 3, and the circular knife supporting table 9 rotates at a uniform speed around the support 3 as centre. The knife carrier 15 is pivoted to the table by means comprising a slot in the underside of the carrier, and a pivot 20 engaging therewith, it being thus adapted to slide radially with respect to its pivot. The actuating- member 22 is pivoted to the knife-carrier at 21 ; and swinging and radial movements about the centre of the support 3 are derived from cam-slots 43, 33 respectively, formed in a member 34 fixed to the standard 12 which carries the patternsupport 3. The motions are all derived from the continuous rotation of the knife-support or table table 9. This carries with it a toothed sector 42, pivoted to it at 42*, which carries a roll engaging the cam-slot 43. The motion of the sector about its pivot is communicated to a sector 40 on a member 39 journaled on the hub of the table 9 and having also an arm 38. This arm carries a block 37 engaging a longitudinal slot 36 in the member 22, and gives to this its swinging movement. The radial movement of this member is effected by a bell-crank, journaled at 31 in the table 9. A roll on one member 32 of this lever engages the cam-slot 33 and rocks the crankmember 30. This motion is conveyed by a link 29 to a lever 27 pivoted at one end to the knifesupport. The free end of this lever is forked and engages a block 28 pivoted to a slide 25 which is movable in radial guides fixed to the table 9. The slide 25 has a segmental slot 24 which engages a roll 23 on the actuating-member 22 to impart to it its radial movement. The member 22 is slotted to receive the pattern - support 3. The extent of radial movement may be adjusted by means of the connexion between the crank 30 and the link 29 which consists of a bolt engaging a curved slot, which is designed so as to render variable only the outermost position of the pivot 21. This adjustment is for accommodating soles of various lengths. The resultant effect of the swinging and sliding movements of the member 22 is to cause the point 21 to describe an approximate ellipse nearly coinciding with the contour of the pattern, indicated by a slot-and-dash line in Fig. 2, and so arranged that the point 21 is substantially stationary at the ends of the ellipse. The knife is then vertically above the pivot 21, and hence experiences no tendency either to leave or cut into the pattern. The swinging movements imparted to the carrier are such as to direct its axis normal to the contour of the sole-edge, and the knife being spring-actuated in this direction is constantly pressed against the edge of the pattern. To increase the amplitude of the swing of the knife-carrier, the pivot 20 is mounted on a bell-crank 44 pivoted to the table 9, the other end of which engages a cam-slot 45 in an extension of the hub 39 which is actuated by the cam-slot 43 to give the member 22 its swinging movement. The pivots 20, 21 move relatively in opposite directions.